English: A drawing of the lichen formerly known as Calicium hyperellum (now Calicium viride), from a scan of a plate from Smith & Sowerby’s English Botany, Vol. X (1843). Smith & Sowerby note the following: “The bright yellow-green thallus forms conspicuous patches on the bark of old oaks and some other trees, chiefly in the eastern and southern counties of England. Pilidia abundant, on slender black stalks: disc convex, nearly hemispherical: border smooth, eventually reflexed.”
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The author died in 1822, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.
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Captions
A drawing of the lichen formerly known as ''Calicium hyperellum''